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15. MAJOR CUSTOMERS AND VENDORS (Details Narrative) - Operator	9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Bitcoin
Representation of company's revenue, percent	100.00%	100.00%
Mining pool operator
Mining pool operator	1	1

X

- Definition

Mining pool operator

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Representation of company's revenue, percent

+ References

No definition available.

+ Details

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Namespace Prefix:	clsk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=clsk_BitcoinMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=clsk_MiningPoolOperatorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: